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Finding the Fourth Proportional to 983.05, 1,356.56 and 540.94

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Solution

The fourth proportional to 983.05, 1,356.56 and 540.94 is: 746.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.05 : 1,356.56 = 540.94 : x
  2. Step 2: Convert to fraction form
    983.05/1,356.56 = 540.94/x
  3. Step 3: Cross multiply
    983.05x = 1,356.56 × 540.94
  4. Step 4: Simplify right side
    983.05x = 733,817.57
  5. Step 5: Solve for x
    x = 733,817.57/983.05
  6. Step 6: Final answer
    x = 746.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.